45 static inline bool pic32_wdt_is_win_enabled(struct pic32_wdt *wdt)  in pic32_wdt_is_win_enabled()  argument
47 	return !!(readl(wdt->regs + WDTCON_REG) & WDTCON_WIN_EN);  in pic32_wdt_is_win_enabled()
50 static inline u32 pic32_wdt_get_post_scaler(struct pic32_wdt *wdt)  in pic32_wdt_get_post_scaler()  argument
52 	u32 v = readl(wdt->regs + WDTCON_REG);  in pic32_wdt_get_post_scaler()
57 static inline u32 pic32_wdt_get_clk_id(struct pic32_wdt *wdt)  in pic32_wdt_get_clk_id()  argument
59 	u32 v = readl(wdt->regs + WDTCON_REG);  in pic32_wdt_get_clk_id()
64 static int pic32_wdt_bootstatus(struct pic32_wdt *wdt)  in pic32_wdt_bootstatus()  argument
66 	u32 v = readl(wdt->rst_base);  in pic32_wdt_bootstatus()
68 	writel(RESETCON_WDT_TIMEOUT, PIC32_CLR(wdt->rst_base));  in pic32_wdt_bootstatus()
73 static u32 pic32_wdt_get_timeout_secs(struct pic32_wdt *wdt, struct device *dev)  in pic32_wdt_get_timeout_secs()  argument
78 	rate = clk_get_rate(wdt->clk);  in pic32_wdt_get_timeout_secs()
80 	dev_dbg(dev, "wdt: clk_id %d, clk_rate %lu (prescale)\n",  in pic32_wdt_get_timeout_secs()
81 		pic32_wdt_get_clk_id(wdt), rate);  in pic32_wdt_get_timeout_secs()
89 	ps = pic32_wdt_get_post_scaler(wdt);  in pic32_wdt_get_timeout_secs()
95 		"wdt: clk_rate %lu (postscale) / terminal %d, timeout %dsec\n",  in pic32_wdt_get_timeout_secs()
101 static void pic32_wdt_keepalive(struct pic32_wdt *wdt)  in pic32_wdt_keepalive()  argument
104 	writew(WDTCON_CLR_KEY, wdt->regs + WDTCON_REG + 2);  in pic32_wdt_keepalive()
109 	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);  in pic32_wdt_start()  local
111 	writel(WDTCON_ON, PIC32_SET(wdt->regs + WDTCON_REG));  in pic32_wdt_start()
112 	pic32_wdt_keepalive(wdt);  in pic32_wdt_start()
119 	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);  in pic32_wdt_stop()  local
121 	writel(WDTCON_ON, PIC32_CLR(wdt->regs + WDTCON_REG));  in pic32_wdt_stop()
134 	struct pic32_wdt *wdt = watchdog_get_drvdata(wdd);  in pic32_wdt_ping()  local
136 	pic32_wdt_keepalive(wdt);  in pic32_wdt_ping()
160 	{ .compatible = "microchip,pic32mzda-wdt", },
175 	struct pic32_wdt *wdt;  in pic32_wdt_drv_probe()  local
177 	wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);  in pic32_wdt_drv_probe()
178 	if (!wdt)  in pic32_wdt_drv_probe()
181 	wdt->regs = devm_platform_ioremap_resource(pdev, 0);  in pic32_wdt_drv_probe()
182 	if (IS_ERR(wdt->regs))  in pic32_wdt_drv_probe()
183 		return PTR_ERR(wdt->regs);  in pic32_wdt_drv_probe()
185 	wdt->rst_base = devm_ioremap(dev, PIC32_BASE_RESET, 0x10);  in pic32_wdt_drv_probe()
186 	if (!wdt->rst_base)  in pic32_wdt_drv_probe()
189 	wdt->clk = devm_clk_get(dev, NULL);  in pic32_wdt_drv_probe()
190 	if (IS_ERR(wdt->clk)) {  in pic32_wdt_drv_probe()
192 		return PTR_ERR(wdt->clk);  in pic32_wdt_drv_probe()
195 	ret = clk_prepare_enable(wdt->clk);  in pic32_wdt_drv_probe()
201 				       wdt->clk);  in pic32_wdt_drv_probe()
205 	if (pic32_wdt_is_win_enabled(wdt)) {  in pic32_wdt_drv_probe()
210 	wdd->timeout = pic32_wdt_get_timeout_secs(wdt, dev);  in pic32_wdt_drv_probe()
218 	wdd->bootstatus = pic32_wdt_bootstatus(wdt) ? WDIOF_CARDRESET : 0;  in pic32_wdt_drv_probe()
221 	watchdog_set_drvdata(wdd, wdt);  in pic32_wdt_drv_probe()
235 		.name		= "pic32-wdt",